Send fireflies to other Worlds within Sir Match-a-Lot by using an airship. Since fireflies are specific to the World in which they're earned and won't transfer automatically, the airship allows you to move this resource around.
Airships cost gold to build. To build an airship, click on the hammer icon and confirm you want to construct it.
Once the airship has been built, click on it to open the Select World menu and choose where you want to ship the fireflies. Firefly airships travel in real time.